/ ˈpærɪsaɪd; NAmE / noun
[ U , C ] ( formal ) the crime of killing your father, mother or a close relative; a person who is guilty of this crime
—compare fratricide , matricide , patricide
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WORD ORIGIN
late 16th cent.: from French , from Latin parricidium murder of a parent, with first element of unknown origin, but for long associated with Latin pater father and parens parent.